[compiler] Add baseline tier to compilation pipeline.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d4590e25fecc35ea1b995fd334cc03a76f02d5fe..00c85f3bb12aab1446a8ecf78de14f8fab917ac2 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7490,13 +7490,14 @@ class JSFunction: public JSObject {
   // Tells whether or not this function has been optimized.
   inline bool IsOptimized();
 
-  // Mark this function for lazy recompilation. The function will be
-  // recompiled the next time it is executed.
+  // Mark this function for lazy recompilation. The function will be recompiled
+  // the next time it is executed.
+  void MarkForBaseline();
   void MarkForOptimization();
   void AttemptConcurrentOptimization();
 
-  // Tells whether or not the function is already marked for lazy
-  // recompilation.
+  // Tells whether or not the function is already marked for lazy recompilation.
+  inline bool IsMarkedForBaseline();
   inline bool IsMarkedForOptimization();
   inline bool IsMarkedForConcurrentOptimization();